Same here, craziness all over.
But after a few runs some installs and updates seem to improve magically. Not all, some. Read my thread here: http://forums.adobe.com/message/4536058
Maybe you can find a manual update for Acrobat X, if that's crucial to you ? For the rest, I think I'll just wait until this AAM trouble has all blown over. Most (failed and succeeded) updates keep complaining about this "CSXS" stuff, which is probably some nifty but still useless framework to have some half baked new service run on sticks...
Do I sound bitter ? YES. Because updating has often been an error-prone experience with Adobe software.